题目

— Excuse me, could you please tell me if the sports meeting     on time?           — It depends. If it     tomorrow, we’ll have to put it off.        A. will start; rains          B. starts; rains        C. will start; will rain                          D. starts; will rain 答案：A 如图所示，∠1＋∠2＋∠3＋∠4＋∠5＝________．